Re: psu ac240as-01 dell Optiplex 7010 pc tower
5 Band resistor
BLUE RED WHITE GOLD GREEN
63 Ω ?! If my eyes got the right colors...
Taruga
Member
Last Activity: 03-28-2025, 06:53 AM
Joined: 12-09-2013
Location: Portimao
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Re: Toshiba A300-211 completely dead no lights at all
I got one today, completely dead no lights at all and the problem was a faulty C260.
I didn't have any voltage on L20 and L24Leave a comment:
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Re: LPK12-450W safety capacitor shorted
What's unsafe, is my electricity outlets. I don't have grounded electricity outlets.
It's a 50 year old house. If I had grounded electricity outlets, then the electrical panel whould shut down and there would be no shock hazzard.
I started this post, because it was a curious issue of a power supply that didn't work on my nephiews house, but it worked fine on my house. Until, I noticed there was current flowing to the power supply metal case
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Re: LPK12-450W safety capacitor shorted
Don't worry
My nephiew got new power supply, this one is/will not be used by him. It's for me, and when I need to use it, it will be mainly to test and repair noisy computer fans.
I have much better spare power supplies to put inside computers.
About the caps, those were what I had here to test and if it stopped leaking current to earth while I get the identical or better ones with the agency approval stamps and capacitance. But they don't look so easy to find at the places I usually buy caps....Leave a comment:
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Re: LPK12-450W safety capacitor shorted
I don't know what a snubber cap is, they're connected like this, live and neutral to the ground.
|...Leave a comment:
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Re: Fsp raider ra 750
Hi Per Hansson,
Thank your for your suggestions.
I don't have much experience with this things.
I just started repairing PSU's, I´ve successfully repaired 2 out of 3.
This is the 3rd one, and I´m waiting for the new capacitor.
About the dim bulb tester, is that used to light up the lamp in case of a short when powering or connecting the PSU ?
I have to build dim bulb tester, before I replace the big capacitor I'm waiting for.
That looks like a usefull tool.
I've connected this PSU to mains...Leave a comment:
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Re: LPK12-450W safety capacitor shorted
Thank you for changing the title of the thread. I wanted to, but I was unable.
I saw the link your posted with all the approval stamps, I didn't know that.
The one's I got to replace don't have any of that.
They look like this:
I will try to find and buy some with the approval stamps. Thanks for the info.
They are not full short, just one of them was detected as a 2788 Ω resistor instead of a capacitor.
Here's the photo of the power supply with...Last edited by Taruga; 06-22-2019, 09:03 AM.Leave a comment:
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Re: Enlight GPS-350CB-102 A
[B]I M P O R T A N T I N F O R M A T I O N[/B]
Ops... I was mistaken and I made confusion with the power supply, because I made the repair of two on the same day.
It was a [B]LPK12-450W[/B] not sure what brand that had problems with the safety capacitors instead of the [B]Enlight GPS-350CB-102 A[/B]
The problem I had with the Enlight GPS-350CB-102 A was another thing. The 5+5VSB was very high, instead of 5V, I had 7.6V and the power supply did not power on.
I replaced a 25V 47uF capacitor with...Leave a comment:
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Re: Enlight GPS-350CB-102 A
Just look on ebay for:
LCR-T4 Mega328 Transistor Tester Diode Triode Capacitance ESR Meter
Example link:
[URL="https://www.ebay.com/itm/LCR-T4-Mega328-Transistor-Tester-Diode-Triode-Capacitance-ESR-Meter-With-Shell-W/222235430386?hash=item33be438df2:g:elsAAOSw~QNdCu2S"]https://www.ebay.com/itm/LCR-T4-Mega328-Transistor-Tester-Diode-Triode-Capacitance-ESR-Meter-With-Shell-W/222235430386?hash=item33be438df2:g:elsAAOSw~QNdCu2S[/URL]
There are a wide variety of these testers
...Last edited by Taruga; 06-22-2019, 07:53 AM.Leave a comment:
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LPK12-450W safety capacitor shorted
This power supply is from my nephew.
This power supply was short-circuited, as soon as he connected the power cord, the electrical panel of the house would shut down.
I tested it in my house and it seemed to work well, the electrical panel of the house did not turn off. The mismatches of 5VSB, +12, -12, +5 +3.3 were all normal. I was not sure what the problem was ... until I got an electric shock from touching the metal case of the power supply.
It seems that there was a current drain to the earth.
My house is older and there are no grounded... -
Re: Fsp raider ra 750
I've tested other capacitor I have here: 400v 150uF with the same tester, looks fine. Low ESR...Leave a comment:
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Re: Fsp raider ra 750
It's discharged, I've made sure of it.
I also tested with another tester I have and it gives the same result.
What should be the normal ESR value for a 420v 390uF capacitor ?
It's the first time I have issues with a big one like this, 18 Ω looks way too high. It should be below 1 Ω or something like that, right ?
Anyway, I´ve just ordered a couple of 390uf 420v Nichicon rated 105ºC, the Teapo is rated 85º C.
I can check capacitance and esr value when I get the new one......Last edited by Taruga; 06-21-2019, 11:41 AM.Leave a comment:
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Fsp raider ra 750
My power supply (FSP RAIDER RA 750) suddenly died, powers on, fan spins and immediately powers off.
The 5vsb is ok.
Capacitors look good, but the first one I tested (the big one from Teapo) doesn't look so good.... -
Re: LG L246WH-BN power on. No display
I have a blown capacitor that is obsolete:
[url]http://www.digikey.com/product-search/en?keywords=DEA1X3A271JA2B[/url]
(270pF ±5% 1000V (1kV) Ceramic Capacitor SL Radial, Disc)
What can I use to replace this obsolete capactor ?Re: LG L246WH-BN power on. No displa... /> What can ILeave a comment:
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